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Priority claimed from US07/249,452external-prioritypatent/US5034180A/en
Application filed by Nu Pipe IncfiledCriticalNu Pipe Inc
Priority to FI946205ApriorityCriticalpatent/FI946205A/en
Publication of FI946205A0publicationCriticalpatent/FI946205A0/en
Publication of FI946205ApublicationCriticalpatent/FI946205A/en